<template>
  <div>
    <el-upload
      class="upload-demo"
      ref="upload"
      :headers="setHeaders"
      :action="baseURL + '/tbSysAttachment/upload'"
      :before-upload="beforeUpload"
      :on-preview="handlePreview"
      :on-change="handleChange"
      :on-progress="handleprogress"
      :on-success="handleSuccess"
      :on-error="handleError"
      :on-remove="handleRemove"
      :before-remove="beforeRemove"
      :file-list="fileList"
      :auto-upload="true"
      :multiple="multiple"
      :accept="accept"
    >
      <el-button size="small" :disabled="disabled" type="custom">{{
        buttonTxt
      }}</el-button>
    </el-upload>
    <p v-show="accept" class="txt-explain"
      >请上传{{ accept }}类型的文件{{ otherExplain }}</p
    >
  </div>
</template>
<script>
export default {
  data() {
    return {
      setHeaders: { Authorization: sessionStorage.getItem('authorization') },
      // fileList: [],
      fileData: [],
      accept: '',
    }
  },
  props: {
    buttonTxt: {
      type: String,
      default: '选择文件',
    },
    multiple: {
      //文件多选
      type: Boolean,
      default: false,
    },
    deleteFileList: {
      //删除文件列表
      type: Boolean,
      default: false,
    },
    fileType: {
      //文件类型 0:全部  1：图片  2：视频  3：文本
      type: Number,
      default: 0,
    },
    disabled: {
      type: Boolean,
      default: false,
    },
    defaultValue: {
      // type: Array,
      default: () => [],
    },
    otherExplain: {
      type: String,
      default: '',
    },
  },
  computed: {
    fileList: {
      get: function () {
        if (this.defaultValue && this.defaultValue.length) {
          this.defaultValue.forEach((v) => {
            this.$set(v, 'name', v.oldName)
          })
          return this.defaultValue
        } else {
          return []
        }
      },
      set: function (value) {},
    },
  },
  mounted() {
    if (this.fileType == 1) {
      this.accept = '.BMP,.JPG,.JPEG,.PNG,.GIF'
    } else if (this.fileType == 2) {
      this.accept = '.mp4,.WebM,.Ogg'
    } else if (this.fileType == 3) {
      this.accept = '.doc,.docx,.ppt,.pptx,.pdf,.xls,.xlsx'
    } else {
      this.accept = ''
    }
  },
  methods: {
    clearFile() {
      this.$refs.upload.clearFiles()
    },
    // 文件上传成功时的钩子
    handleSuccess(res, file, fileList) {
      // console.log(fileList)
      if (this.disabled) return
      if (res.code == 0) {
        if (this.multiple) {
          this.fileData.push(res.data[0])
        } else {
          this.fileData = []
          this.fileData.push(res.data[0])
        }
        this.$emit('e-fileData', this.fileData)
        if (this.deleteFileList) {
          this.$refs.upload.clearFiles()
        }
      } else {
        this.$message({
          message: res.msg,
          type: 'warning',
        })
      }
    },
    handleChange(file, fileList) {
      if (this.multiple) return
      this.fileList = fileList.slice(-1)
    },
    // 上传文件之前的钩子
    beforeUpload(file) {
      let maxSize = 0.5 * 1024 * 1024
      if (this.fileType == 1 && file.size > maxSize) {
        this.$message({
          message: '您上传的图片资源过大，会影响加载速度，建议控制在0.5M以内',
          type: 'warning',
        })
      }
    },
    // 文件上传时的钩子
    handleprogress(file) {},
    // 点击文件列表中已上传的文件时的钩子
    handlePreview(file) {},
    beforeRemove(file, fileList) {
      // return this.$confirm(`确定移除 ${file.name}？`);
    },
    // 文件列表移除文件时的钩子
    handleRemove(file, fileList) {
      this.fileData = []
      if (fileList.length) {
        fileList.forEach((v) => {
          //判断是回显数据还是新上传数据
          if (v.hasOwnProperty('response')) {
            this.fileData.push(v.response.data[0])
          } else {
            this.fileData.push(v)
          }
        })
      }
      this.$emit('e-fileData', this.fileData)
    },
    handleError() {
      this.$message.error('上传失败，请重试')
    },
  },
}
</script>
<style scoped lang="scss">
</style>